Number
1,390
1,390 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 13
- Digital root
- 4
- Palindrome
- No
- Divisor count
- 8
- σ(n) — sum of divisors
- 2,520
Primality
Prime factorization: 2 × 5 × 139
Divisors & multiples
Aliquot sum (sum of proper divisors):
1,130
First multiples
Representations
- In words
- one thousand three hundred ninety
- Ordinal
- 1390th
- Roman numeral
- MCCCXC
- Binary
- 10101101110
- Octal
- 2556
- Hexadecimal
- 56E
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1390, here are decompositions:
- 17 + 1373 = 1390
- 23 + 1367 = 1390
- 29 + 1361 = 1390
- 71 + 1319 = 1390
- 83 + 1307 = 1390
- 89 + 1301 = 1390
- 101 + 1289 = 1390
- 107 + 1283 = 1390
Showing the first eight; more decompositions exist.
Unicode codepoint
ծ
U+056E
Lowercase letter (Ll)
UTF-8 encoding: D5 AE (2 bytes).
Hex color
#00056E
RGB(0, 5, 110)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.110.